Abstract: A modular endovascular graft wherein the graft body sections may be secured to each other by a variety of methods, including attachment elements having inflatable circumferential channels that interlock with other inflatable channels, recessed pockets or the like. Embodiments may have inflatable cuffs for sealing against an inside surface of a patient's fluid flow lumen, such as a blood vessel. Embodiments may also include expandable stents secured to and extending from ends of the various graft body sections for mechanically securing the graft, or sections thereof, to the patient's fluid vessels.